Stop block and switch for railway tracks



Nov. 1924. 1,514,043

LL HAASTED STOP BLOCK AND SWITCH FOR RAILWAY TRACKS med Nov 50. 192: ZShoots-Sheet 1 "ma-.4 4. 1924." Q 1,514,043

L. HAASTED STOP B cK-AND swmon FOR RAILWAY TRACKS Fqed Ndv. so .1921 a 2 Shasta-Sheet 2 Federated Nov. 4, 1924s UNIT ED.

LAURITZ I-IAASTED, OF DRAMMEN, .NORWAY.

STOP BLOCK AND 'SW-IZCI-I FOR RAIIAJVAY TRACKS.

Application filed November 30,, 1823. Se'nial 'No. 677,767.

To all whom it may concern:

Be it known that I, Lime-Ira HAAs'rnD, a subject of the King of Norway, residing at Drammen, Norway, have invented certain new and useful Improvements in Stop Blocks and Switches for Railway Tracks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which "form a part of this specification.

My invention relates .to hand operated turnover stop blocks for railway tracks. In such stop blocks it is known to arrange the control locks of the stop block and of the switch, respectively, in such manner that they are vmutually dependent of each other, the arrangement being such that the key of thecontrol lock of the stop block, which has normally its place in thecontrol lock of the switch, .can only be released from this look by aid of a key :fitting into a key hole in this control lock, and the turning of which releases the key of the stop-block control look.

In this arrangement the stop block is, howener, free to be turned back into .bloclc ing position, while the switch is still turned on to the branch track.

The object of my invention is to provide an arrangement in which the turning back of the thrown .ofl stop bloc-k into its blocking position is prevented so long as the switch blades are open to the branch track or are open to the main track, but are unlooked.

In the accompanying drawings Fig. 1 is a plan diagram of an arrangement according to my invention. Fig. 9. is a plan view f the stop block locking arrangement, and F is a corresponding side view of the same. Fig. 4 is a plan view of a modified locking arrangement. Fig. 5 a diagrammatic side view of a control look of a type suitable for the switch and Fig. 6 is a plan view on. a larger scale of a control lock of a type suitable for the stop block. Fig. 7 is a diagrammatic view of an electric switch for operating a control circuit.

The turn-over stop block a, whose pivot bolt 6 is turnably mounted in journals (Z, d in well known manner, is provided with looking levers or plates m and g, placed,

each other.

The .lock 72 is arranged in such manner that the key k actuating the lock bolt 2' can be removed from the zlo'ckon ly when the stop block a is in its blocking position, lying across the rail, and with the lock bolt '2' in engagement with the locking lever m, there- :by preventing the throwing off of the stop block a.

The lock bolt .y'atthe same time is in its netraclted position. The key Z, needed for actuating said lock bolt 7', which is also the only lrey by aid of which the control lockc of the switch :(Fig. 1) may be actuated, is hereby locked in place in the stop block control lock 1). In this position the locking lever or plate m or eventually the mutual dependence between the two lock bolts, will prevent the retracting of the lock bolt j, and the hey Ztherczfore w ll be locked in its position in the lock as long as the stop block remains in this position; at the same time, however, the lock bolt '5 may be retracted by turning the hey is, which is thereby released from the lock.

When the switch is looked with its blades open to the main track 0- (Fig. 1) and the stop block a is locked in its active position,

the switch is to be shifted into position for the branch track N, the key 70, which is normally to be kept in the station masters office, is taken out to the stop block a. and inserted into its key hole .70 2) and is turned about. Hereby the lock bolt '1', which has hitherto been locking the stop block a in its operative position, is retracted, and the stop block now may be swung into its inoperative position.

In this latter position of the stop block the key Z, (either owing .to the removal of the lever or plate m from the path of its lock bolt or in consequence of reciprocally guided motions of the two lock bolts mentioned ab ove) will be free to be turned, thereby pushing the lock 3' into engagelaying the switch blades over to the branch track N. In this inactive posit-ion of the stop block the lever or plate 9 is lying across the path of the lock bolt 2', thereby locking the key into its keyhole. p v

The stop block being thus turned down and locked intoits inoperative position, the

branch track N is now open and switched 1n.

W hen the points are again switched back to the main track and the control lock 0 of the switch is locked, the key'Z is free to be removed from it and is inserted in its keyhole Z in the stop block control lock self in the keyhole. The stop block is now free to be turned over into its operative or blocking position across the rail, whereupon the key Zc is turned, thereby pushing the lock bolt 2' into engagement with the lever or plate, and locking the stop block in position, whereupon this key is free to be taken out of the lock 1 and removed to the station masters office, where it is kept in a place destined for it, or preferably, is inserted in a special electric switch hereinafter described, thereby cutting in a con trol circuit to the nearest station on both sides, and signalling thereby a free main line.

Through the arrangement described in the foregoing it is made impossible to throw the stop block in operative position so long as there is any possibility of the switch control lock allowing the points to be switched on to the branch track.

Instead of a. single control lock with two bolts and two keys dependent of each other, I may of course use two independent control locks, the dependency of the two keys being then obtained by letting the lovers or plates m, 9' in one position act as stops for the lock bolts, thereby preventing the turning of the corresponding key (as illustrated in Fig.

In Fig. et is illustrated a modified lock arrangement, which differs from that de scribed in the foregoing only therein that the two control locks b, r of the stop blocks are placed independent of each other on opposite sides of the stop block, which latter is in this case provided with two sets of looking levers or plates m, g, each corresponding to one control lock. It will, however, be understood, that the arrangement of the control lock or looks and of ing the moveable tongue or blade at of the switch in its open position. lVhen the switch is to be shifted, this is effected by inserting the key Z, in the lock 0, and turn ing it about so as to allow the bar If to be drawn out in the position shown in broken lines to the left on Fig. 5. This being done, the tongue or blade 24 is free to be shifted to the position shown in broken lines adjacent to the stock rail, but as long as the bar 6 is in this position the key Z cannot be removed from the key hole 0, this being only possible when the bar 6 has been pushed into its tongue locking position.

Fig. 6 is a diagram of the control look a 011 Fig. 3 or 4. When the key is is inserted in the key hole 70, the lock bolt '5 locking the stop block in its operative position is retracted, the key 7: being thereby locked in the lock, it being only possible to remove it when the look bolti is inits pushed out position. I

After having swung off the stop block a, the key Z of the other control lock is turned round, pushing out the lock bolt j thereby locking the stop block in its inoperative position. Now the locked key Z may be removed from its lock 6, and then inserted in the switch control lock, thereby allowing the shifting of the switch bar 15.

As stated above the key is when removed from the lock 1* may be used for operating an electrical switch such as illustrated in Fig. 7. Said key being inserted in the switch displaces a lever 1 against the pull of a spring 2. The lever has an insulated portion 3 which, on the key 76 being fully inserted, is turned so as to bring two spring contacts i and 5 together, thereby closing the signalling circuit 6, '7 to the nearest stations.

As already mentioned my invention does not comprise the specific mechanical construction of the control locks, any suitable type of controlv locks being adaptable for the novel control arrangement forming the object of this invention.

Claims 1. In hand operated turnover stop blocks for railway tracks with a control lock for the switch and a control lock for the stop block, the combination of the stop block control lock, and the switch control lock, with means for making said locks dependent on each other in such a way as to prevent the shifting of the stop block from its inoperative to its operative position until the key of the switch control lock has been placed into position in the control lock of the stop block.

2. The combination of a stop block for a switch rail, a control lock for the latter, a lock for the stop block, means for actuating the last named lock to permit the stop block to be moved into inoperative position, and a key for actuating the switch control lock normally retained in the lock of the stop block when the latter is in operative position.

The combination ol :1- stop block for a switch rail, a control lock for the latter, a W

lock for stop block to prevent the shifting of the block into inoperative position, a key to actuate the lock of the stop block whereby to lock the block in inoperative position, said 30 locking means including keys one of which is adapted to actuate the locking means to permit the stop block to be moved into in operative position and the other key adapted to lock the block in inoperative position and to actuate the rail control look.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

f i L. HAASTED. Witnesses:

MAGNUS BUQRE, OLGA OLSEN. 

